Enzymes are important to metabolic reactions of the cell in which of the following ways? Enymes allow reactions that could not normally occur. Enzymes lower the activation energy needed for the reaction. Enzymes increase the rate (speed) of reaction so that the reaction occurs more quickly. Both A and B are correct Both B and C are correct. 1 points QUESTION 2 What is the correct term for the area on the enzyme which binds to and interacts with the substrate? Substrate binding site Active site Allosteric site Cofactor Amino acid bridge 1 points QUESTION 3 What is the expected result of the substrate binding to the enzyme? Metabolic pathway proceeds Metabolic pathway stops and can not restart Metabolic pathway stops but can resume when inhibition is removed Substrate binding to the enzyme has no effect on cell function. 1 points QUESTION 4 Where, on the enzyme, will a competitive inhibitor bind? Active site Allosteric site Both of these simultaneously Both of these at different times Neither A nor B 1 points QUESTION 5 What is the expected result when a competitive inhibitor binds to the enzyme? Metabolic pathway proceeds Metabolic pathway stops and can not restart Metabolic pathway stops but can resume when the inhibition is removed. The competitive inhibitor binding to the enzyme has no effect on cell function. 1 points QUESTION 6 In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct name of this process? Noncompetitve inhibition Competitive Inhibition Feedback inhibition Answers 1 and 3 are correct. Answers 1 and 2 are correct. All answers are correct. 1 points QUESTION 7 In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct term for the area on the enzyme where this binding occurs? Active site Allosteric site Substrate binding site Amino acid bridge None of these 1 points QUESTION 8 What is the expected result when the endproduct of a metabolic pathway binds to an enzyme in that pathway? Metabolic pathway proceeds Metabolic pathway stops and cannot restart Metabolic pathway stops but can resume when the inhibition is removed. The binding of the endproduct to the enzyme has no effect on cell function. 1 points QUESTION 9 Most enzymes are active at one particular temp. What result on enzyme function would you expect if a bacteria culture was placed at a temperature BELOW its “best” temperature? No effect on enzyme activity Enzyme activity would slow but continue Enzyme activity would quickly stop Enzyme activity would increase 1 points QUESTION 10 Most enzymes are active at one particular temp. What result on enzyme function would you expect if a bacteria culture was placed at a temperature ABOVE its “best” temperature? No effect on eznyme activity Enzyme activity would slow but continue Enzyme activity would quickly stop Enzyme activity would gradually slow over a 2-3 day period
